胎儿朗 2°8眙 a a8 i& ye 2 16 23 (a) normal human male chromosomes XY sex chromosomes sex chromosomes 9 mother posibble sperm possible types ova types XX possible genotypes of zygote XY (in boxes) possible phenotypes 2xx 2Y of offspring females males
一 胎儿期
新生儿期-出生4周内
二 新生儿期 - 出生4周内
三儿童期4周-12岁左右 allopian tube Body of uterus undus of srte Fimbriae Endometrium Myometrium Cervix Female reproductive organs
三 儿童期 4周—12岁左右